duet 0.6.0

bi-directional synchronization
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130

// Modified from the initial version provided by Kagi's Code Assistant

use std::io::{self};
use std::pin::Pin;
use std::task::{Context, Poll};
use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};

// ===== STDIN WRAPPERS =====

/// A wrapper that can hold either tokio::process::ChildStdin or openssh::ChildStdin
pub enum StdinWrapper {
    OpensshStdin(openssh::ChildStdin),
    TokioStdin(tokio::process::ChildStdin),
}

// Asynchronous Write implementation
impl AsyncWrite for StdinWrapper {
    fn poll_write(
        self: Pin<&mut Self>, 
        _cx: &mut Context<'_>, 
        buf: &[u8]
    ) -> Poll<io::Result<usize>> {
        // We need to get a mutable reference to self
        let this = self.get_mut();

        match this {
            StdinWrapper::OpensshStdin(stdin) => {
                // Similar to std stdin
                Pin::new(stdin).poll_write(_cx, buf)
            },
            StdinWrapper::TokioStdin(stdin) => {
                // Similar to std stdin
                Pin::new(stdin).poll_write(_cx, buf)
            },
        }
    }

    fn poll_flush(
        self: Pin<&mut Self>, 
        _cx: &mut Context<'_>
    ) -> Poll<io::Result<()>> {
        let this = self.get_mut();

        match this {
            StdinWrapper::OpensshStdin(stdin) => {
                //stdin.poll_flush()
                Pin::new(stdin).poll_flush(_cx)
            },
            StdinWrapper::TokioStdin(stdin) => {
                //stdin.poll_flush()
                Pin::new(stdin).poll_flush(_cx)
            },
        }
    }

    fn poll_shutdown(
        self: Pin<&mut Self>, 
        _cx: &mut Context<'_>
    ) -> Poll<io::Result<()>> {
        // Standard stdin doesn't have a shutdown method, so we just return Ok
        let this = self.get_mut();

        match this {
            StdinWrapper::OpensshStdin(stdin) => {
                //stdin.poll_flush()
                Pin::new(stdin).poll_shutdown(_cx)
            },
            StdinWrapper::TokioStdin(stdin) => {
                //stdin.poll_flush()
                Pin::new(stdin).poll_shutdown(_cx)
            },
        }
    }
}

// From implementations
impl From<openssh::ChildStdin> for StdinWrapper {
    fn from(stdin: openssh::ChildStdin) -> Self {
        StdinWrapper::OpensshStdin(stdin)
    }
}

impl From<tokio::process::ChildStdin> for StdinWrapper {
    fn from(stdin: tokio::process::ChildStdin) -> Self {
        StdinWrapper::TokioStdin(stdin)
    }
}

// ===== STDOUT WRAPPERS =====

/// A wrapper that can hold either tokio::process::ChildStdout or openssh::ChildStdout
pub enum StdoutWrapper {
    OpensshStdout(openssh::ChildStdout),
    TokioStdout(tokio::process::ChildStdout),
}

// Asynchronous Read implementation
impl AsyncRead for StdoutWrapper {
    fn poll_read(
        self: Pin<&mut Self>,
        _cx: &mut Context<'_>,
        buf: &mut ReadBuf<'_>
    ) -> Poll<io::Result<()>> {
        let this = self.get_mut();

        match this {
            StdoutWrapper::OpensshStdout(stdout) => {
                // Similar to std stdout
                Pin::new(stdout).poll_read(_cx, buf)
            },
            StdoutWrapper::TokioStdout(stdout) => {
                // Similar to std stdout
                Pin::new(stdout).poll_read(_cx, buf)
            },
        }
    }
}

// From implementations
impl From<openssh::ChildStdout> for StdoutWrapper {
    fn from(stdout: openssh::ChildStdout) -> Self {
        StdoutWrapper::OpensshStdout(stdout)
    }
}

impl From<tokio::process::ChildStdout> for StdoutWrapper {
    fn from(stdout: tokio::process::ChildStdout) -> Self {
        StdoutWrapper::TokioStdout(stdout)
    }
}